LTC1700EMS 查看數據表（PDF） - Linear Technology

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LTC1700EMS

No RSENSE Synchronous Step-Up DC/DC Controller

Linear Technology 

LTC1700

ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. VOUT = 3V unless otherwise specified.

SYMBOL

TG tr

TG tf

BG tr

BG tf

tdll

tdhh

PARAMETER

TG Transition Time

TG Gate Drive Rise Time

TG Gate Drive Fall Time

BG Transition Time

BG Gate Drive Rise Time

BG Gate Drive Fall Time

Dead Time

BG and TG Gates Go Low

BG and TG Gates Go High

CONDITIONS

CLOAD = 3000pF, 10% to 90%

CLOAD = 3000pF, 90% to 10%

CLOAD = 3000pF, 10% to 90%

CLOAD = 3000pF, 90% to 10%

CLOAD = 3000pF on BG and TG

CLOAD = 3000pF on TG and BG

MIN TYP MAX UNITS

60

100

ns

60

100

ns

80

100

ns

50

70

ns

88

110

ns

66

90

ns

Note 1: Absolute Maximum Ratings are those values beyond which the life

of a device may be impaired.

Note 2: The LTC1700E is guaranteed to meet performance specifications

from 0°C to 70°C. Specifications over the –40°C to 85°C operating

temperature range are assured by design, characterization and correlation

with statistical process controls.

Note 3: TJ is calculated from the ambient temperature TA and power

dissipation PD according to the following formula:

TJ = TA + (PD • 150°C/W)

Note 4: At an input supply less than 2.3V, only the start-up circuitry of the

LTC1700 is active. This test ensures the start-up circuitry is working.

Note 5: An input supply at or above this minimum operating voltage

activates the main control loop. Start-up circuitry of the LTC1700 is

shut off.

Note 6: Dynamic supply current is higher due to the gate charge being

delivered at the switching frequency.

Note 7: The LTC1700 is tested in a feedback loop that servos VFB to the

feedback point for the error amplifier (VITH = 0.6V)

TYPICAL PERFORMANCE CHARACTERISTICS

Reference Voltage vs

Temperature

1.210

1.208

1.206

1.204

1.202

1.200

1.198

1.196

1.194

1.192

1.190

– 55 –35 –15 5 25 45 65 85 105 125

TEMPERATURE (°C)

1700 G01

Shutdown Current vs Supply

Voltage

20

18

16

14

12

10

8

6

4

2

0

1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0

SUPPLY VOLTAGE (V)

1700 G02

Quiescent Current vs Supply

Voltage

250

200

150

100

50

0

1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0

SUPPLY VOLTAGE (V)

1700 G03

1700fa

3

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